论文信息 - Symmetric highly efficient (/spl sim/0 dB) wavelength conversion based on four-wave mixing in quantum dot optical amplifiers

Symmetric highly efficient (/spl sim/0 dB) wavelength conversion based on four-wave mixing in quantum dot optical amplifiers

Conversion efficiency to longer wavelengths in four-wave-mixing-based wavelength conversion in optical semiconductor amplifiers is generally much lower than that in the opposite direction. This study demonstrates experimentally that this feature is drastically improved, and the asymmetry between conversion directions is eliminated by using quantum dots in the active layer. We attribute this to a reduction in linewidth enhancement factor due to the discreteness of the electron states in quantum dots.

[1] Kerry J. Vahala,et al. Terahertz four‐wave mixing spectroscopy for study of ultrafast dynamics in a semiconductor optical amplifier , 1993 .

[2] Hiroshi Ishikawa,et al. THz frequency conversion using nondegenerate four-wave mixing process in a lasing long-cavity λ/4-shifted DFB laser , 1995 .

[3] M. Kakui,et al. Observation of highly nondegenerate four-wave mixing in 1.5 mu m traveling-wave semiconductor optical amplifiers and estimation of nonlinear gain coefficient , 1992 .

[4] Haruhiko Kuwatsuka,et al. Nonlinear processes responsible for nondegenerate four-wave mixing in quantum-dot optical amplifiers , 2000 .

[5] Kohki Mukai,et al. Molecular beam epitaxial growth of InAs self-assembled quantum dots with light-emission at 1.3 μm , 2000 .

[6] Govind P. Agrawal,et al. Population pulsations and nondegenerate four-wave mixing in semiconductor lasers and amplifiers , 1988 .